27106T Vertical Propeller Anemometer
11
b. Unthread generator housing collar. Pull generator housing away from
sensor connector and generator assembly.
c. Note position of generator wires on sensor connector pins. Unsolder
wires from pins and remove old generator assembly.
2. Install new generator assembly:
a. Solder wires from new generator assembly onto proper sensor
connector pins. Verify correct polarity; CCW rotation produces
negative output voltage.
b. Slide generator housing over generator assembly. Firmly tighten
housing collar onto connector threads.
c. Check bearing torque to confirm it is within specification.
8.2 Troubleshooting
Symptom: No wind speed
1. Check that the sensor is wired to the single-ended channel specified by the
VoltSE
instruction.
2. Disconnect the sensor from the datalogger and use an ohm meter to check
the tach-generator. The resistance between the white and black wires
should be about 32
Ω
. Infinite resistance indicates an open coil; low
resistance indicates a shorted coil.
3. Verify that the
Range
parameter for the
VoltSE
instruction is correct for
the datalogger type.
9. References
References containing additional information about the 207106T are listed
below in chronological order.
Holmes, R.M., Gill, G.C., and Carson, H.W., “A Propeller Type Vertical
Anemometer”, Journal of Applied Meteorology, Vol 3, 1964, pp. 802-804
Drinkow, R., “A Solution to the Paired Gill-Anemometer Response Function”,
Journal of Applied Meteorology, Vol 11, 1972, pp. 7-80.
Hicks, B. B., “Propeller Anemometers as Sensors of Atmospheric Turbulence”,
Boundary-Layer Meteorology, Vol 3, 1972, pp. 214-228
Fichtl, G. H., and Kumar, P., “The Response of Propeller Anemometer to
Turbulent Flow with the Mean Wind Vector Perpendicular to the Axis of
Rotation”, Boundary-Layer Meteorology, Vol 6, 1974, pp. 363-379.
McMichael, J.M., and Klebanoff, P. S., “The Dynamic Response of Helicoid
Anemometers”, NBSIR 75-772, National Bureau of Standards, 1975.
R.M Young Model 27106 Gill Propeller Anemometer Manual PN:
#
27106-90,
Rev: D030106
